3805378744644 has 81 divisors (see below), whose sum is σ = 9849358038429. Its totient is φ = 1238796659520.

The previous prime is 3805378744613. The next prime is 3805378744669. The reversal of 3805378744644 is 4464478735083.

The square root of 3805378744644 is 1950738.

It is a perfect power (a square), and thus also a powerful number.

3805378744644 is a `hidden beast` number, since 3 + 80 + 5 + 3 + 78 + 7 + 446 + 44 = 666.

It can be written as a sum of positive squares in only one way, i.e., 905850904644 + 2899527840000 = 951762^2 + 1702800^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 503286624 + ... + 503294184.

Almost surely, 2^{3805378744644} is an apocalyptic number.

3805378744644 is the 1950738-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3805378744644

3805378744644 is an abundant number, since it is smaller than the sum of its proper divisors (6043979293785).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3805378744644 is an frugal number, since it uses more digits than its factorization.

3805378744644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15218 (or 7609 counting only the distinct ones).

The product of its (nonzero) digits is 216760320, while the sum is 63.

The spelling of 3805378744644 in words is "three trillion, eight hundred five billion, three hundred seventy-eight million, seven hundred forty-four thousand, six hundred forty-four".